Infineon Technologies CY91F523BSDPMC1-GSE1

Overview

CY91F523BSDPMC1-GSE1 from Infineon Technologies (formerly Cypress) is a 32-bit FR81S automotive microcontroller with 384 KB + 64 KB program flash, 48 KB main RAM + 8 KB backup RAM, and integrated CAN 2.0B controllers (3 channels, up to 1 Mbps). It features IEEE 754-compliant FPU, memory protection unit (MPU), and operates from -40°C to +125°C for engine control units and body electronics.

For engineers reviewing the CY91F523BSDPMC1-GSE1 datasheet, CY91F523BSDPMC1-GSE1 pinout, CY91F523BSDPMC1-GSE1 application, or CY91F523BSDPMC1-GSE1 equivalent, key selection criteria include its 80 MHz FR81S core, dual 12-bit ADC (max 48 ch), LIN 2.1 support, RTC with sub-clock calibration, and LQFP-144 package with 120 GPIOs (no sub-oscillator configuration).

Technical Context

The CY91F523BSDPMC1-GSE1 implements a 5-stage pipelined FR81S RISC core with 16×32-bit general-purpose registers, 16-bit fixed-length instructions, and hardware multiplier (signed 32-bit in 5 cycles). It supports privilege/user modes via an 8-region MPU and includes IEEE 754 single-precision FPU with 16×32-bit floating-point registers.

Peripherals include three independent CAN controllers (128/64-message buffers), twelve multi-function serial interfaces (UART/CSIO/LIN/I²C), dual 12-bit successive-approximation ADCs (1.4 µs conversion), two 8-bit R-2R DACs, and a real-time clock with sub-oscillator ratio correction via prescaler-enabling precise timekeeping in automotive powertrain and chassis systems.

Key Specifications

Pinout & Package

LQFP-144 package (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3. Pinout validated per Infineon datasheet 002-04662 Rev. *I, pages 12–17.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit automotive microcontroller applications.

Compared with SPC560P50L5CEFAY and TC377TP-64F200N-DC, the CY91F523BSDPMC1-GSE1 delivers optimal balance of FPU-enabled control math, calibrated RTC, and LIN/CAN coexistence in a single LQFP-144 package-ideal for ASIL-B engine and body domain controllers where deterministic timing and sensor fusion are prioritized over CAN FD or lockstep redundancy.

Availability

CY91F523BSDPMC1-GSE1 is available at Aetrix Electronics and suitable for engine control units, electric power steering modules, and body control modules requiring stable component supply across automotive production lifecycles.

Supply support for CY91F523BSDPMC1-GSE1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, and security solutions with deep expertise in automotive-grade MCUs and silicon carbide technologies.

The CY91520 series was developed by Cypress (now Infineon) specifically for automotive powertrain and chassis applications demanding high reliability, extended temperature operation, and integrated communication peripherals-including CAN, LIN, and calibrated RTC for deterministic real-time control.

FAQ

What is the maximum operating frequency and instruction cycle time of the CY91F523BSDPMC1-GSE1?

The CY91F523BSDPMC1-GSE1 achieves a maximum operating frequency of 80 MHz using its on-chip PLL with 4.0 MHz crystal input and 20× multiplication. This yields a minimum instruction execution time of 12.5 ns per cycle, confirmed in the official datasheet (002-04662 Rev. *I, page 5). The FR81S core executes most 16-bit instructions in a single cycle due to its 5-stage pipeline and load/store architecture.

Does the CY91F523BSDPMC1-GSE1 support CAN FD or only classical CAN 2.0B?

The CY91F523BSDPMC1-GSE1 supports only classical CAN 2.0B, not CAN FD. Its three CAN controllers operate at up to 1 Mbps with message buffers sized for standard 11-bit identifiers and 8-byte payloads. The datasheet explicitly lists "CAN" without FD reference and specifies bit timing registers compatible only with CAN 2.0B arbitration and data phases (002-04662 Rev. *I, section 11.3.1).

How many GPIOs are available in the LQFP-144 package, and are they all individually configurable?

In the LQFP-144 package with no sub-oscillator enabled, the CY91F523BSDPMC1-GSE1 provides 120 general-purpose I/O ports (P00–P119), all individually configurable as digital inputs/outputs, interrupt sources, or peripheral function pins. Pin multiplexing is managed via I/O relocation registers, allowing dynamic reassignment of functions like UART TX/RX or ADC inputs to alternate pins without hardware changes.

What is the role of the sub-clock calibration feature in the real-time clock (RTC)?

The sub-clock calibration feature corrects RTC time drift by measuring the ratio between the main oscillator (e.g., 4 MHz) and the 32 kHz sub-oscillator, then adjusting the RTC prescaler accordingly. This compensates for quartz crystal aging and temperature-induced frequency shifts-ensuring ±1 ppm accuracy over automotive temperature ranges without external calibration hardware, as documented in section 11.10.2 of the datasheet.